| Patents for G09B 23 - Models for scientific, medical, or mathematical purposes, e.g. full-sized device for demonstration purposes (20,724) |
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| 10/30/1991 | CN2087800U Pyramid and prismoid demonstrating model |
| 10/30/1991 | CN1055829A Comprehensive demonstrator for static electricity |
| 10/29/1991 | US5061188 Pneumothorax diagnostic and treatment manikin |
| 10/29/1991 | US5061187 Ultrasound training apparatus |
| 10/23/1991 | CN2087371U Demonstrating model of straight and plane |
| 10/16/1991 | CN2086927U Teaching aid for testing substance conductance |
| 10/16/1991 | CN2086926U 全天候验电器 Weather electroscope |
| 10/16/1991 | CN2086925U Trace writer for horizontally parabolic motion |
| 10/15/1991 | US5057021 Arrow-plot with color coded azimuth |
| 10/09/1991 | CN2086442U Multi-functional combined optics experiment instrument |
| 10/09/1991 | CN2086441U Multi-functional vibration composed demonstrating instrument |
| 10/09/1991 | CN2086440U Level throwing motion locus displaying unit |
| 10/09/1991 | CN2086439U Multi-functional mathematics teaching, studying demonstrating board |
| 10/08/1991 | US5055259 Bloodless blood typing training kit |
| 10/08/1991 | US5055052 Model for practicing artificial respiration and a simulated respiratory tract |
| 10/08/1991 | US5055051 Semi-anthropomorphic biliary/renal training phantom for medical imaging and lithotripsy training |
| 10/03/1991 | WO1991015267A1 Cpr prompting apparatus |
| 10/03/1991 | WO1991015007A1 A portable rescue administration aid device |
| 10/03/1991 | WO1991014943A1 Apparatus and method for modeling arterial thrombus formations |
| 10/03/1991 | CA2079816A1 Cpr prompting apparatus |
| 10/02/1991 | CN2085989U Recording analyser for motion track |
| 10/02/1991 | CN2085988U Electromagnetic spring vibrator |
| 10/02/1991 | CN1054908A Assembling puzzle toy for electronic skill training |
| 10/01/1991 | US5052934 Phantom for evaluation of prosthetic valves and cardiac ultrasound procedures |
| 09/25/1991 | CN1054862A Energy-saving device for single-phase electric devices |
| 09/25/1991 | CN1054861A Pole-variable windings for adjustable-speed motor |
| 09/18/1991 | CN1054682A One-board computer lan teaching and displaying system |
| 09/17/1991 | US5049080 Waterwheel demonstrating apparatus |
| 09/17/1991 | CA1288939C Breast cancer detection training device |
| 09/12/1991 | DE4039126A1 Artificial muscle filling system with filler tube - incorporates tube, with ring to assist flow of inflation gas |
| 09/11/1991 | CN2084632U Vibration synthetic demonstrator |
| 09/10/1991 | US5046984 Bouncing ball launcher |
| 09/10/1991 | CA1288864C Process for developing a statistical model to determine the workload of an aircraft pilot, model derived therefrom, apparatus for the embodiment of the said process and applications of the model |
| 09/05/1991 | WO1991011793A3 Display apparatus |
| 09/05/1991 | WO1991008561A3 Teaching apparatus |
| 09/03/1991 | US5044206 Structural load analysis apparatus |
| 08/28/1991 | CN2083778U Electrolyte solution electric conduction demonstrating instrument |
| 08/28/1991 | CN2083777U Moveable polygon model |
| 08/28/1991 | CN2083776U Geometry theorem composite teaching-aid box |
| 08/27/1991 | US5042972 Toy building set provided with elements that can sense bar codes |
| 08/27/1991 | CA1287973C Geometric modeling kit and method of making same |
| 08/21/1991 | CN2083317U Models for projection demonstration of middle-school physics |
| 08/14/1991 | CN2082885U Case type combined utensils for studying primary optica |
| 08/14/1991 | CN2082884U Multifunctional circular nature demonstrator |
| 08/08/1991 | WO1991011793A2 Display apparatus |
| 08/08/1991 | DE4003480A1 Demonstrating chemical processing - using appts. with interconnected glass units at standard spacings, interchangeably mounted on plates in upright railed stand |
| 08/07/1991 | CN2082445U Portable electrolysis (electroplating) experiment device for teaching |
| 08/07/1991 | CN2082444U Overweight-weightlessness demonstration instrument |
| 08/07/1991 | CN2082443U Circle demonstration model |
| 08/07/1991 | CN2082442U Stroke-question demonstration device |
| 08/07/1991 | CN2082420U Micro-current detecting instrument |
| 08/06/1991 | US5037306 Training device for an automatic injector |
| 08/06/1991 | US5037305 Graphic method for reporting risk to a patient |
| 07/31/1991 | CN2081750U Demonstration toy with magnetic pattern |
| 07/25/1991 | DE4001923A1 Sinusoidal curve representation method - moves curves along abscissa, causing rotation of spindle with pointers |
| 07/24/1991 | CN2081555U Wave projecting apparatus |
| 07/24/1991 | CN2081554U Gas law experiment apparatus |
| 07/24/1991 | CN1053315A Mirage demonstration instrument |
| 07/17/1991 | EP0437339A1 Training electrode for use in defibrillator/monitor instruction and method of instruction |
| 07/17/1991 | CN2081120U Transparent filmed plant wax leaf specimen with primary color |
| 07/17/1991 | CN2081119U Photochemical reaction demonstrator for gas |
| 07/10/1991 | EP0394270A4 Timing device |
| 07/10/1991 | CA2033702A1 Training electrode for use in defibrillator/monitor instruction and method of instruction |
| 07/09/1991 | US5030103 Dynamic molecular model |
| 07/09/1991 | US5030102 Mounting arrangement for an exchangeable tooth in an artificial dental jaw model |
| 07/09/1991 | CA2007437A1 Multifunctional block and kit for science instruction |
| 07/03/1991 | CN2080203U Water electrlyser |
| 07/03/1991 | CN2080202U Dynamic simulated demonstration instrument |
| 07/03/1991 | CN2080201U Experiment device for mechanics teaching |
| 07/03/1991 | CN2080200U Three purpose test instrument for electrolysis, electroplating and galvanic cell |
| 06/27/1991 | DE4033528A1 Solar energy assembly - is digitised in modules with direct conversion of light into energy in automated process |
| 06/26/1991 | CN2079786U Stereo magnetic-field demonstrator |
| 06/26/1991 | CN2079785U Combined motor teaching aid |
| 06/26/1991 | CN2079784U Dolygon teaching aid |
| 06/26/1991 | CN1052452A Method for making artistic articles of animal or botanical specimen by covering plastic film |
| 06/25/1991 | US5026314 Magnetically actuated amusement device |
| 06/25/1991 | US5026286 Color standard arrangement |
| 06/19/1991 | CN2079337U Multi-function teaching-aid display instrument |
| 06/19/1991 | CN1052385A Piston type momentum law tester |
| 06/13/1991 | WO1991008561A2 Teaching apparatus |
| 06/13/1991 | WO1991008560A1 Method and apparatus for simulation of a physical process |
| 06/12/1991 | EP0394271A4 Doll |
| 06/12/1991 | CN2078914U Stethoscope for teaching |
| 06/12/1991 | CN2078913U Demonstrator of chemical experimental facility |
| 06/12/1991 | CN2078912U Liquid-gas automatic pressure-regulating electrolyzer for water |
| 06/12/1991 | CN2078911U Optical-energy-type infrared detector |
| 06/12/1991 | CN2078910U Geometric figures demonstrator |
| 06/05/1991 | CN2078475U 电子电路实验台 Electronic circuit bench |
| 06/05/1991 | CN2078474U Equi-time displacement demonstration apparatus for freely falling bodies |
| 06/05/1991 | CN2078473U Composite goniometer for multi-kind of geometrical bodies |
| 05/30/1991 | WO1991007737A1 Cpr manikin |
| 05/29/1991 | DE4017614A1 Topography simulation e.g. for etching semiconductor - uses modified diffusion model having lattice of virtual points in space occupied by workpiece |
| 05/29/1991 | CN2078033U Blood function demonstrator of heart pump |
| 05/29/1991 | CN2078032U Optical combined intelligence-toy |
| 05/29/1991 | CN2078031U Synthesizing testing instrument of water lashing |
| 05/29/1991 | CN1051807A Folded dual-purpose demonstrator for pulleys and shafts |
| 05/28/1991 | US5018977 Motorcycle accident simulating test dummy |
| 05/28/1991 | US5018396 Cell assembly for determining conductivity and permeability |
| 05/22/1991 | CN2077572U Electronic metering demonstrator using human galvanic cell |
| 05/16/1991 | WO1991006935A1 System for computerized simulation of operations on the human body |